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All Journal IAES International Journal of Artificial Intelligence (IJ-AI) Transmisi: Jurnal Ilmiah Teknik Elektro Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Bulletin of Electrical Engineering and Informatics Jurnal Mahasiswa TEUB Jurnal EECCIS Bulletin of Electrical Engineering and Informatics Network Engineering Research Operation [NERO] Indonesian Journal of Electrical Engineering and Computer Science Jurnal INFOTEL
Mudjirahardjo, Panca
Jurusan Teknik Elektro Fakultas Teknik Universitas Brawijaya
Computer Science & IT Education Electrical & Electronics Engineering Engineering

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Quartz Crystal Microbalance (QCM) Sensor Array with Varying PMMA Coatings for Coffee Roasting Aroma Monitoring Muttaqin, Adharul; Sakti, Setyawan Purnomo; Naba, Agus; Mudjirahardjo, Panca
Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Vol 14, No 1: March 2026 (ACCEPTED PAPERS)
Publisher : IAES Indonesian Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52549/ijeei.v14i1.7760

Abstract

This study investigates how polymethyl methacrylate (PMMA) coating concentration (3–15 wt%) tunes the response of an eight-channel Quartz Crystal Microbalance (QCM) sensor array to real coffee roasting volatiles at 200–240 °C. One channel was left uncoated as a reference, while seven channels were coated with different PMMA concentrations to introduce controlled response diversity. Baseline-corrected frequency shifts were processed into qualitative features describing response magnitude, kinetics, and early recovery, and principal component analysis (PCA) was used to visualize multichannel pattern structure across repeated roasts. Consistent temperature-dependent response patterns were observed, while run-to-run variability increased at higher temperatures. The first two principal components captured ~75% of the total variance (PC1 dominated by integrated response magnitude and PC2 reflecting kinetic variability). Because chamber humidity increased during roasting, a supplementary robustness check was performed using recorded RH; temperature-dependent structure remained after accounting for humidity effects. Overall, discrimination arises from the collective multichannel response, suggesting potential applicability of PMMA-coated QCM arrays for qualitative coffee roasting monitoring, pending further validation with larger datasets and complementary analytical methods.
Co-Authors Abdul Goffar Ricky Mahendra Achmad Basuki Adharul Muttaqin Agus Naba Ahmad Syafiq Kanzul Fikri Aiman Muhamad Basymeleh Airlangga, Daniar Putri Aldy, Farouq Akbar Alkafi Dimitri Sukmana Andy Kurnia Santoso Angger Abdul Razak Anthony Wijoyo Arafah, Ghifari Raihan Bagus Esa Pramudya Bidin Yuniar Hamzah Bima Feridhan Nugraha Bimasena, Muhammad Farrel Brahmana, Nigel Shidqy Razendriya Chandra Halim Harahap Dachlan, Hary Soekotjo Danny Kurnianto Doni Juli Wiranata Eka Maulana Erni Yudaningtyas Esa Ilham Akbar Faradisa , Annisa' Illah Farihah Hedar Fatchur Rozi Al Fitrah Fauzi, Maher Feishal Reza Firmansyah, Vicky FX. Arinto Setyawan Gilang Luih Pinandita Haidar Taqy Hartono, Rafendra Ariwardana Hary Soekotjo Dachlan Hasdi Sasandi Ismail Musirin Ismail Musirin Ita Dwi Purnamasari Izanati, Nazuha Juan Mora Michael Marbun Juli Arianes Leonard Dimas Prakoso Lilik J. Awalin Lukman Gumelar M Fauzan Edy Purnomo M. Hanif Azhary M. Julius St Julius St M. Julius St Julius St, M. Julius St Machfud Firmansyah Manerep Luis Fernando Purba Marco Gunawan Maulana, Eka Maulana, Eka Miladina Rizka Aziza Mohammad Alif Robby Gani Mohammad Ilhammudin Toiyib Monifa Arini Muhammad Akbar Muhammad Aziz Muslim Muhammad Ikhsan Muhammad Ivan Fadillah Muhammad Rafi’ Zaidan Maajid Muttaqin, Adharul n/a Soeprapto Nanang Sulistiyanto Nathanael, Indra Notario Pramudita Nugraha, Dimas Aji Nurus Sa'adah Nurussa’adah, n/a Octarudin Mahendra Oky Risky Dwi Santoso Pangemanan, Christofel Panjaitan, Gian Amadea Pebrianto, Wahyu Permatasari, Alissa Dyah Ayu Ponco Siwindarto Pratolo Rahardjo R. A. Setyawan Rachmawati, Luthfiyah Raden Arief Setyawan Rahmadwati Rahmadwati Rahmadwati, n/a Rahmadwati, n/a Rahmadwati, Rahmadwati Rauf, Daru Adiyatma Reinato Teguh Santoso Reza, Feishal Ricky Insyani Santosa P. P. Ridho Herasmara Rif'an, Mochammad Rifqa Asruroh Efnif Rini Nur Hasanah Riza Hasbi Ash Shiddieqy Rizky Aiman Haniffalah Harijanto Robbith Qosath Al Auhi Rohman, Muhammad Ariefur Samuel Aji Sena Sena, Samuel Aji Septi Uliyani Setyawan Purnomo Sakti Sholeh Hadi Pramono Sirojul Hadi Sofyan Andika Yusuf Sultoni Sultoni Sultoni, Sultoni Surya Agung Kurnia Suyono, Hadi Syarifah, Naily Tri Nurwati Vira Zafarin Waru Djuriatno Waru Djuriatno Widihansyah, Bayu Wuri Roro Indraswari yuliana diah pristanti Zainuri, Akhmad